Create a radio button via python
This is how you do it:
# This is how you make a static enum prop for the scene
enum_items = (('0','Cube',''),('1','Pyramid',''))
bpy.types.Scene.obj_type = bpy.props.EnumProperty(items = enum_items)

# This is how you display it in panel
def draw(self, context):
    layout = self.layout
    layout.label(text=&quot;Select Original Form&quot;)

    layout.prop(context.scene, 'obj_type', expand=True)